1 /*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "art_field.h"
18
19 #include "art_field-inl.h"
20 #include "class_linker-inl.h"
21 #include "gc/accounting/card_table-inl.h"
22 #include "handle_scope.h"
23 #include "mirror/class-inl.h"
24 #include "mirror/object-inl.h"
25 #include "mirror/object_array-inl.h"
26 #include "runtime.h"
27 #include "scoped_thread_state_change.h"
28 #include "utils.h"
29 #include "well_known_classes.h"
30
31 namespace art {
32
ArtField()33 ArtField::ArtField() : access_flags_(0), field_dex_idx_(0), offset_(0) {
34 declaring_class_ = GcRoot<mirror::Class>(nullptr);
35 }
36
SetOffset(MemberOffset num_bytes)37 void ArtField::SetOffset(MemberOffset num_bytes) {
38 DCHECK(GetDeclaringClass()->IsLoaded() || GetDeclaringClass()->IsErroneous());
39 if (kIsDebugBuild && Runtime::Current()->IsAotCompiler() &&
40 Runtime::Current()->IsCompilingBootImage()) {
41 Primitive::Type type = GetTypeAsPrimitiveType();
42 if (type == Primitive::kPrimDouble || type == Primitive::kPrimLong) {
43 DCHECK_ALIGNED(num_bytes.Uint32Value(), 8);
44 }
45 }
46 // Not called within a transaction.
47 offset_ = num_bytes.Uint32Value();
48 }
49
FindInstanceFieldWithOffset(mirror::Class * klass,uint32_t field_offset)50 ArtField* ArtField::FindInstanceFieldWithOffset(mirror::Class* klass, uint32_t field_offset) {
51 DCHECK(klass != nullptr);
52 auto* instance_fields = klass->GetIFields();
53 for (size_t i = 0, count = klass->NumInstanceFields(); i < count; ++i) {
54 if (instance_fields[i].GetOffset().Uint32Value() == field_offset) {
55 return &instance_fields[i];
56 }
57 }
58 // We did not find field in the class: look into superclass.
59 return (klass->GetSuperClass() != nullptr) ?
60 FindInstanceFieldWithOffset(klass->GetSuperClass(), field_offset) : nullptr;
61 }
62
FindStaticFieldWithOffset(mirror::Class * klass,uint32_t field_offset)63 ArtField* ArtField::FindStaticFieldWithOffset(mirror::Class* klass, uint32_t field_offset) {
64 DCHECK(klass != nullptr);
65 auto* static_fields = klass->GetSFields();
66 for (size_t i = 0, count = klass->NumStaticFields(); i < count; ++i) {
67 if (static_fields[i].GetOffset().Uint32Value() == field_offset) {
68 return &static_fields[i];
69 }
70 }
71 return nullptr;
72 }
73
ProxyFindSystemClass(const char * descriptor)74 mirror::Class* ArtField::ProxyFindSystemClass(const char* descriptor) {
75 DCHECK(GetDeclaringClass()->IsProxyClass());
76 return Runtime::Current()->GetClassLinker()->FindSystemClass(Thread::Current(), descriptor);
77 }
78
ResolveGetType(uint32_t type_idx)79 mirror::Class* ArtField::ResolveGetType(uint32_t type_idx) {
80 return Runtime::Current()->GetClassLinker()->ResolveType(type_idx, this);
81 }
82
ResolveGetStringName(Thread * self,const DexFile & dex_file,uint32_t string_idx,mirror::DexCache * dex_cache)83 mirror::String* ArtField::ResolveGetStringName(Thread* self, const DexFile& dex_file,
84 uint32_t string_idx, mirror::DexCache* dex_cache) {
85 StackHandleScope<1> hs(self);
86 return Runtime::Current()->GetClassLinker()->ResolveString(
87 dex_file, string_idx, hs.NewHandle(dex_cache));
88 }
89
90 } // namespace art
91